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Hiking trails & Routes

Switzerland

Espace Mittelland

District de Porrentruy

Bonfol

Historic Border Marker D/F/CH – Étangs de Bonfol loop from Bonfol

Routes

Hiking trails & Routes

Switzerland

Espace Mittelland

District de Porrentruy

Bonfol

Historic Border Marker D/F/CH – Étangs de Bonfol loop from Bonfol

Moderate

4.6

(8)

hikers

Historic Border Marker D/F/CH – Étangs de Bonfol loop from Bonfol

03:52

14.6km

140m

Hiking

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels. The starting point of the route is accessible with public transport.

Last updated: April 22, 2026

Waypoints

Start point

Train Station

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5.60 km

Kilometre Zero South of the Western Front of the Great War

Highlight • Historical Site

Circular hike on historic paths in a varied landscape.

Translated by Google •

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7.00 km

Footbridge Over the Largue

Highlight • Bridge

In 2012, the Command of Territorial Region 1 made engineers available to rebuild the observation post identically and to develop an educational trail of about 300 meters, including a pedestrian bridge - required by law - made of untreated fir on the Largue stream. But already in 2020, this gateway was showing signs of weakness and was no longer practical.
From August 5 to 14, 2020, the Swiss section of the Swiss KM0 Association was able to benefit from a detachment of engineer troops under the command of Division Chief Yvon Langel to replace the defective bridge.

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7.09 km

Kilometer 0 Border Marker of the Western Front

Highlight • Monument

At border post 111, on the French-Swiss border near Pfetterhouse, the Western Front of the First World War officially began in the autumn of 1914. This spot, where the borders of France, Germany and Switzerland had previously met, became the symbolic Kilometre Zero of a front line that stretched over 750 kilometres to the North Sea. Today it is a peaceful spot along a hiking and cycling trail, where you literally stand at the start of one of the most defining fronts in modern history.

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7.14 km

Swiss Army Observation Post No. 2

Highlight • Historical Site

Near the border stone 111, the official Kilometre Zero of the Western Front, there was a wooden observation post of the Swiss army during the First World War. This Poste d'observation N°2 offered a view of the French and German lines, while Switzerland maintained its neutrality 1. The post was a symbol of the tense calm at this unique border location, where three armies followed each other closely. Today, the site has been partly reconstructed and forms a special historical point along the hiking and cycling path in the far south of Alsace.

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8.29 km

Old Railway Bridge of the Altmühlenweg

Highlight • Bridge

This old railway bridge in pink sandstone, located on the route of the former railway line between Bonfol (Switzerland) and Pfetterhouse, is today a charming part of the cycle route on the Altmühlenweg trail. The bridge was rebuilt to allow cyclists and hikers to pass safely and is a tangible reminder of the time when Pfetterhouse was a strategic border station between France, Germany and Switzerland. From 1871 to 1914, it was the "tri-border point" of Europe, and during the First World War the Western Front began here at the so-called Kilometre Zero.

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8.80 km

Former Pfetterhouse–Bonfol Railway Line

Highlight • Trail

A testimony of the past.

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8.91 km

Historic Border Marker D/F/CH

Highlight • Monument

Border before 1918 Germany/France/Switzerland.
The story of our great-grandparents. Many panels with photos from back then.

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14.1 km

Étangs de Bonfol

Highlight • Lake

If you're looking for a scenic and challenging trail running destination, you should visit the Étangs de Bonfol, a series of ponds located near the border between France and Switzerland. This area offers a variety of trails, ranging from easy to moderate, that will take you through forests, meadows and wetlands. You'll enjoy views of the water, wildlife and wildflowers, while testing your endurance and agility over rugged terrain.

Translated by Google •

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14.6 km

End point

Train Station

Way Types & Surfaces

Way Types

10.9 km

1.75 km

1.14 km

755 m

Surfaces

6.27 km

4.99 km

1.42 km

1.21 km

686 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (480 m)

Lowest point (420 m)

Weather

Sunday 5 July

28°C

13°C

0 %

Additional weather tips

Max wind speed: 13.0 km/h

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Historic Border Marker D/F/CH – Étangs de Bonfol loop from Bonfol

Kilometre Zero South of the Western Front of the Great War

Footbridge Over the Largue

Kilometer 0 Border Marker of the Western Front

Swiss Army Observation Post No. 2

Old Railway Bridge of the Altmühlenweg

Former Pfetterhouse–Bonfol Railway Line

Historic Border Marker D/F/CH

Étangs de Bonfol

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